Keyboard



FIG. 1 is a top, perspective view of a keyboard showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom, perspective view thereof.

The broken lines are for the purpose of illustrating portions of the keyboard, and form no part of the claimed design. 

The ornamental design for a keyboard, as shown and described. 